System and method for failure recovery in a shared storage...

Details System and method for failure recovery in a shared storage... System and method for failure recovery in a shared storage...

2006-04-14

2009-08-18

McCarthy, Christopher S (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C709S213000, C709S214000

Reexamination Certificate

active

07577865

ABSTRACT:
A system and method is disclosed for failure recovery and communications in a shared storage system. The shared storage system includes at least two host nodes, each of which includes two ports. Each of the ports of each of the nodes is coupled to input ports of a storage enclosure. The input ports of the storage enclosures are in turn coupled to one another to form communications links between each of the host nodes. When the communications links between the host nodes fail, the host nodes are able to pass configuration information to each other by saving configuration information to a central location in a shared storage, such as a dedicated location in one of the storage drives of the storage enclosure that is directly coupled to both host nodes. The host nodes are able to force their peer nodes to read configuration changes before accessing possibly corrupted data from a previous configuration.

REFERENCES:
patent: 6606690 (2003-08-01), Padovano
patent: 6735676 (2004-05-01), Kanda et al.
patent: 7039741 (2006-05-01), Bakke et al.
patent: 7240234 (2007-07-01), Morita et al.
patent: 2003/0074417 (2003-04-01), Kasako et al.
patent: 2007/0038749 (2007-02-01), Noya et al.

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